Method and device for joint oxydation and heat treatment of workpieces
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United States of America Patent
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May 7, 2002
Grant Date -
N/A
app pub date -
Feb 22, 2000
filing date -
Aug 22, 1997
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Abstract
Disclosed is a method for joint oxydation and heat treatment of workpieces at temperatures .ltoreq.1300.degree. in the treatment chamber of an oven containing a neutral or reactive gas in a temperature range above 570.degree.. In order for the process to be reproducible and to produce homogeneous oxide layers, the PH.sub.2 O/PH.sub.2 ratio is adjusted after transformation of the workpiece structure such as found at the ambient temperature into the structure wanted during the heat treatment in such a way that the line FeO+H.sub.2 =Fe+H.sub.2 O is exceeded and an oxide layer is formed from FEO<10 .mu.m.
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